package lishizheng.demo06;

//测试生产者消费者，利用缓冲区解决，即管程法

//what do we need?
//生产者，消费者，产品，缓冲区
public class TestPC {
    public static void main(String[] args) {
        SynContainer container = new SynContainer();
        new  Producer(container).start();
        new  Consumer(container).start();

    }
}

//生产者
class Producer extends Thread{
    SynContainer container;
    public Producer( SynContainer container){
        this.container = container;
    }

    //生产

    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println("生产了 " + i + "只鸡");
            container.push(new Chicken(i));
        }
    }
}

//消费者

class Consumer extends Thread{
    SynContainer container;
    public Consumer( SynContainer container){
        this.container = container;
    }

    //消费


    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println("消费了第 " + container.pop().id  + " 只鸡");
        }
    }
}

//产品

class Chicken{
    int id;

    public Chicken(int id) {
        this.id = id;
    }
}

//缓冲区
class SynContainer{
    //容器大小10
    Chicken[] chickens = new Chicken[10];
    //容器计数器
    int count = 0;

    //生产者放入产品
    public synchronized void push(Chicken myChicken){
        //如果容器满了,等待消费者消费
        if(count == 10){
            //通知消费者消费，生产者等待
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        //如果未满，则放入产品
        chickens[count] = myChicken;
        count++;
        //进程通信，通知 消费者消费
        this.notifyAll();

    }


    //消费者消费产品
    public synchronized Chicken pop(){
        //判断能否消费
        if(count == 0){
            //等待生产者生产,消费者等待
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        //如果可以消费
        count --;
        Chicken chicken = chickens[count];

        //吃完了，通知生产者生产
        this.notifyAll();
        return chicken;
    }
}